Laws are a reasonable (thought still incredibly difficult) solution in the parts of the planet that have the rule of law. Large parts don't, and we need different solutions in those places because this is a global problem.

As an example, see this report about cheating on an international agreement about CFCs (https://www.nrdc.org/experts/david-doniger/chilling-news-spo... which) were supposed to have been phased out worldwide by 2007.

Unfortunately, we don't have the international governance in place to attack this problem, and we might not until its too late. Still, you go to war with the army you have, and this is the one we've got.